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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Christian<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The answer would depend on your environment. I’d suggest to benchmark both iscsi and nfs. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I would probably favor NFS since its easier to maintain and takes care of file locking and can be shared amongst multiple hosts. I’m not saying that you cant do the same with ISCSI, but looking at ease of NFS – I would probably go with NFS. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Benchmarking would help you make the final decision.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Good luck<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>ilya<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> rhelv6-list-bounces@redhat.com [mailto:rhelv6-list-bounces@redhat.com] <b>On Behalf Of </b>Masopust, Christian<br><b>Sent:</b> Friday, May 04, 2012 4:56 AM<br><b>To:</b> Red Hat Enterprise Linux 6 (Santiago) discussion mailing-list<br><b>Subject:</b> Re: [rhelv6-list] Your opinion regarding NFS vs. iSCSI<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>Hi again,</span><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>thanks for all your answers and discussions, but it drove away a little from my original question :)</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>which was: what do you favour: iSCSI or NFS based storage for a database? any experiences</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>in differences regarding performance when running a database on an iSCSI- or NFS-based storage?</span><o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>thanks a lot,</span><o:p></o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:blue'>christian</span><o:p></o:p></p><blockquote style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p><div class=MsoNormal align=center style='text-align:center'><span lang=DE><hr size=2 width="100%" align=center></span></div><p class=MsoNormal style='margin-bottom:12.0pt'><b><span lang=DE style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>Von:</span></b><span lang=DE style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> rhelv6-list-bounces@redhat.com [mailto:rhelv6-list-bounces@redhat.com] <b>Im Auftrag von </b>Grzegorz Witkowski<br><b>Gesendet:</b> Montag, 30. April 2012 20:15<br><b>An:</b> rhelv6-list@redhat.com<br><b>Betreff:</b> Re: [rhelv6-list] Your opinion regarding NFS vs. iSCSI</span><span lang=DE><o:p></o:p></span></p><p>It is easy and simple to build fully redundant iscsi network which will deliver and cost much less than FC. Also troubleshooting is pretty easy. iSCSI can be a really good choice if the design is right.<br>There are many factors involved. You cannot simply ask "iscsi or fc?"<o:p></o:p></p><div><p class=MsoNormal>On Apr 30, 2012 4:01 p.m., "Jussi Silvennoinen" <<a href="mailto:jussi_rhel6@silvennoinen.net">jussi_rhel6@silvennoinen.net</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><p class=MsoNormal>Hi all,<br> <br>I'm going to plan the setup of a database-server (MySQL) and now a<br>discussion started about<br>how the storage should be connected. Some favour iSCSI,<o:p></o:p></p></blockquote><p class=MsoNormal>others NFS (V4).<o:p></o:p></p><p class=MsoNormal><br>What's your opinion? Where are advantages / disadvantages?<o:p></o:p></p><p class=MsoNormal>Which solution<o:p></o:p></p><p class=MsoNormal>would promise<br>most performance?<o:p></o:p></p><p class=MsoNormal><br>Curious, SAN is not in your list at all. Why?<br>How important is your service availability to you?<o:p></o:p></p></blockquote><p class=MsoNormal><br>Hi Jussi,<br><br>it's also in discussion :) And sure, the service IS important, database<br>will be for mailbox-servers (Zarafa).<br><br>Currently we're focusing on iSCSI vs. NFS as we don't have FC-equipment<br>but already have 10Gbit ethernet..<o:p></o:p></p></blockquote><p class=MsoNormal style='margin-bottom:12.0pt'><br>I've gotten in to my flame retardant gear so here goes.<br><br>Ethernet ís single fabric meaning a single admin error or unexpected end result of plugging new gear to it can bring the whole shebang down. Post-failure less than joyful consistency check marathon is sure to follow.<br><br>For me, that is unacceptable. I'd rather be enjoying my beer at the local pub instead. FC SAN being multi-fabric, you have to try really hard to break everything.<br><br>Whatever the transport technology is based on, ethernet, FC or snails on steroids, if it has multiple independent fabrics, I'm willing to listen.<br>Otherwise, I'll pass.<br><br>I really don't see any need or use for FCoE. I do like the idea of a single communications channel (redundant) but FCoE is a poor excuse for a solution towards that. iSCSI is much simpler protocol but suffers the same single fabric shortcoming.<br><br>Perhaps there are ways out there to do ethernet-based blockstorage reliably that other list members know about, I'd certainly want to know about them.<br><br><br><br>-- <br><br> Jussi<br>_______________________________________________<br>rhelv6-list mailing list<br><a href="mailto:rhelv6-list@redhat.com">rhelv6-list@redhat.com</a><br><a href="https://www.redhat.com/mailman/listinfo/rhelv6-list" target="_blank">https://www.redhat.com/mailman/listinfo/rhelv6-list</a><o:p></o:p></p></div></blockquote></div></body></html>